Combined switch-socket and restoring-annunciator.



No. 759,383. PATENTED MAY 10, 1904.

. A. M. KNUDSEN. COMBINED SWITCH SOCKET AND RESTORING ANNUNCIATOR.

APPLIOATION FILED OUT. 13, 1900.

N0 MODEL.

,UNiTEi) STATES Patented May 10, 1904.

PATENT ()FFICE.

ANTON M. KNUDSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO L. SANDS, OF

-OLEVELAND, OHIO.

COMBINED SWITCH-SOCKET. AND RESTOlRING-ANNUNCIATOR- SPECIFICATION forming part of Letters Patent N0. 759,383, dated May 10, 1904. Application filed Oct0ber l3, l900. Serial No. 32,910. (No model.) I

To all whom, it may concern. 7 Be it known that I, ANTON M. KNUDsnN, a citizen of the United States, residing at Ohicago, in the countyof Oookand State of Illinois, have invented a certain new and useful Improvement in a Combined Switch-Socket and Restoring-Annunciator, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to an improvement in self-restoring annunciators; and my object is to'provide means whereby the insertion of the connecting-plug in the spring-jack or switchsocket will restore theannunciator to its original position without other attention.

I have illustrated my invention in the accompanying drawings, in which- Figure l is a side view of the device of my invention. Fig. 2 is a rear view thereof. Fig. 3 is a front view thereof, and Fig. 4 is a detailed view in section.

Like letters refer to like eral figures.

The frame a of the spring-jack carries on parts in the sevone end the front plate a and upon the other the back plate a. This back plate is provided with a pair of screws t b, which have the thumb-nuts Z2 6 and act as terminals for the spring-jack and, moreover, as means to hold the whole device in place in the switchboard. Upon the upper part of the back plateis secured by a screw (0 the iron-clad magnet or annunciator 0, one end of which is connected, by means of the conductor a, to the plate 0 and the other end of which is connected, by means of the conductor 0 to the spring (1. Upon this magnet e is fastened, by means of the screw 0*, the strip 0, which extends to and is fastened upon the front plate (4 Upon this strip 0 is pivoted at e the armature f of the magnet c, and carried upon this armature at substantially right angles thereto and extending forward therefrom is the arm g, which extends through the front plate a and carries a hook g at its end.

An adjustable arm 70 is pivoted,by means of a screw is, to the strip 6 and carries the spring Z. The spring Z is attached at the other end to the armature f and is adapted to have its tension altered by adjustment .of the arm k, so as to vary the diificulty of the attraction of the armature f to suit the strength of the current and the length of the subscribers line.

A luga. is formed upon the front plate a and to this lug is pivoted at m the drop-shutterm, which is adapted tobe held in place by thehook g. and which has the downwardly and rearw ardl y extending projection m which moves in the slot m in the front plate. The two lugs an. are formed upon the mouth of the spring-jack, and upon them is pivoted at n the lever 0. This lever has a weighted lower end 0, adapted to hang in the path of the spring-jack plug 19 and to be engaged and rocked thereby, and an insulated upper end '0 adapted to move in the slot m and engage the extension of of the shutter m and rock the shutter about the pivot m. The front end of the jack frame a is provided with a cylindrical pluga, which has an opening 0, adapted to receive and retain the plug 9.

Secured to the back plate by means of the head of the screw t and extending forward parallel to the frame a and then downward, so as to enter the path of the plug p and be engaged thereby, is the line-spring (Z. Beneath this line-spring d is the contact-spring 01, which is connected to one end of the winding of the magnet 0.

To the rear of the front plate are fastened a pair of springs 1' 9, which extend through a pair of openings in the front plate and have extensions which are adapted to engage the shutter 77?. when it drops, and thus complete the night-bell circuit in a well-known manner. The front plate is surrounded by strips 8 s of brass or other material, which are adapted to hold the device in position and to furnish a conductor for the night-bell circuit.

The operation of my inventionis as follows: When a current is sent into the drop from'the calling-station, the magnet 0 is energized call has been sent in. In answering the call the operator inserts the plug 2 into the opening 32. The end of the plug 10 strikes the lower end of the arm 0 and rocks it on its axis. The upper end thereof is thus brought in contact with the extension m of the shutter m and rocks the latter upon its axis until it is caught and held in position by the hook 9. When the plug p is withdrawn, the weight of the lower end of the arm 0 restores the latter to its original position ready for another call.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a telephone-annunciator, the combination with a spring-jack, of a plug therefor, a shutter adapted to operate the night-bell circuit, and a pivoted arm operated by said plug and engaging said shutter to restore the same to its normal position after it has fallen, said arm being insulated at the point where it engages said shutter to prevent short-circuiting the night-bell circuit.

2. In a telephone-annunciator, the combination with a spring-jack, of a plug therefor, a shutter adapted to control the night-bell circuit, and a pivoted arm operated by said plug and engaging said shutter to restore the same to its normal position after it has fallen, said arm having an insulated block at the point where it engages said shutter to prevent shortcircuiting the night-bell circuit.

3. In a telephone-'annunciator, the combination with a shutter of an operating-magnet therefor, an arm pivotally secured at one end to the support for the armature of said magnet, and a spring connected with the other end of said arm and said armature, whereby the difficulty with which said armature may be moved may be varied, substantially as described.

4. In a telephone-annunciator, the combination of a pair of plates, a shutter arranged on one of said plates, a magnet mounted on the other plate, a bar secured to said magnet, a mechanism for releasing said shutter controlled by said magnet and supported by said bar, and means carried by said first plate for returning said shutter to its normal position, substantially as described.

5. In a telephone-annunciator, the combination of a spring-jack, a plug therefor, an operating-magnet, a shutter and an arm insulated from said shutter and operated by said plug for restoring said shutter, substantially as described.

In witness whereof I have hereunto subscribed my name in the presence of two witnesses.

ANTON M. KNUDSEN.

Witnesses:

HENRY W. BELFIELD, M. R. RooHFoRD. 

